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. 2014 Jun 10;111(5):1004–1013. doi: 10.1038/bjc.2014.306

Table 2. Patient and tumour characteristics of cell cycle checkpoint kinase 2 (CHEK2) 1100delC mutation carriers and noncarriers.

  Carrier
Noncarrier
 
  n % n % P-value
Number of patients
193
 
4529
 
 
Median follow-up in years
6.8 (0.6–31.9)
 
7.2 (0.1–38.9)
 
 
Age at breast cancer diagnosis
Median (years) 50.0   51.4   0.003
Mean (years) 50.1   52.8    
Range (years) 22.5–78.0   18.7–79.9    
<40 37 19.2 714 15.8 0.14
40–50 59 30.6 1326 29.3  
⩾50
97
50.3
2489
55.0
 
Year of diagnosis
<1990 58 30.1 1590 35.1 0.04
1990–2000 83 43.0 1996 44.1  
>2000
52
26.9
943
20.8
 
Synchronous contralateral breast cancer
No 189 97.9 4443 98.1 0.87
Yes
4
2.1
86
1.9
 
T stage
T1 95 51.9 2074 47.2 0.23
T2 72 39.3 1886 42.9  
T3 11 6.0 264 6.0  
T4 5 2.7 168 3.8  
Unknown
10
(5.2)
137
(3.0)
 
N stage
Negative 105 57.1 2388 53.9 0.31
1–3 35 19.0 1096 24.7  
4+ 44 23.9 949 21.4  
Unknown
9
(4.7)
96
(2.1)
 
Differentiation grade
1 21 14.7 370 10.5 0.11
2 52 36.4 1155 32.6  
3 70 49.0 2014 56.9  
Unknown
50
(25.9)
990
(21.9)
 
Hormone receptor status
Negative 9 5.5 759 19.3 <0.001
Positive 157 94.5 3173 80.7  
Unknown
30
(15.5)
597
(13.2)
 
HER2/neu
Negative 73 76.0 1886 80.7 0.26
Positive 23 24.0 452 19.3  
Unknown 97 (50.2) 2191 (48.3)